From the publisher's website: A thrillride of an adventure for 3rd or 4th level heroes, designed to be played in one or two sessions. If you play Robin D. Laws’ The Strangling Sea at first level you can use Sharpe Initiatives as a callback to events earlier in the PCs’ careers; but this adventure is designed to bulldoze itself into any campaign in which dwarves aspire to re-engineer the broken underworld.